Questão 2126602

\(\left\{\frac{\pi}{6},\frac{\pi}{2}\right\}\)

\(\left\{\frac{\pi}{6},\frac{2\pi}{3}\right\}\)

\(\left\{\frac{\pi}{3},\ \pi\right\}\)

\(\left\{\frac{\pi}{3},\ \frac{2\pi}{3}\right\}\)

\(\left\{\frac{2\pi}{3},\ \pi\right\}\)